neuropsychopharmacology?
“An implicit premise in neuropsychopharmacology with regard to the psychological aspects is that all states of mind, including both normal and drug-induced altered states, and diseases involving mental or cognitive dysfunction, have a neuro-chemical basis at the fundamental level, and certain circuit pathways in the central nervous system at a higher level.”https://en.wikipedia.org/wiki/Neuropsychopharmacology#Overview